Proper rating of used albums

I have had good success with the purchase of used albums. It's fun to get back into vinyl. However, there are some sellers out there who will exaggerate the condition of their product. Beware...
That is the #1 problem with used LPs over the internet. It used to be much worse over on eBay. Where garbage would be sold and if you complained, you got cussed at and given terrible feedback.
Some of the sellers just do not know what they are doing, others deliberately cheat and figure the market is so huge, they can get away with it.
Then other sellers who rate honestly, or even underrate fine LPs, trying hard to be fair.
I quit buying from eBay years ago. I am lucky I have several local resources for used LPs. And since i already have 6,000 I do not need much other than to fulfill my desire to get out and browse around.
There is nothing like being able to browse through the Lps oneself. Plus better deals nearly always locally compared to the internet. I only buy a few things anymore from internet sources, and those are specific things i really want. Like Mark Murphy "Kerouac Then and Now" LP. Which is the most recent Lp I bought online. I could look for years locally and never see one.
Even if you have to travel an hour or two to get to a brick and mortar used record store, it usually is worthwhile. Both for the feel of handling the Lps, and finding a personal treasure now and then at a seemingly bargain price!
One would actually have to hear a used LP to rate it accurately. I think most sellers rate LP's based on visual inspection. My experience is that visual is a good indicator but no guarantee of quality. I have bought LP's that looked good and sounded poor and LP's that look suspect but sounded good. Having said all that I much prefer examining them myself before buying. I have had pretty good luck with used LP's bought locally and on audiogon. Never bought LP's on Audiogon.
I "won" an auction where I purchased 38 albums. All albums were over rated. I contacted the seller by e-mail, but he refused to give me a refund saying that I should have asked more questions before buying. As I said, they were rated on the Goldmine scale, but the albums shipped didn't match the rating given - not even close. I appealed to the staff @ Audiogon and they forced the seller to give me a refund.